Servidores DNS Principal (mname) y Secundario (rname)
host: mvcr.gov.cz
class: IN
ttl: 86400
type: SOA
mname: ns2.gov.cz
rname: hostmaster.gov.cz
serial: 1734439508
refresh: 86400
retry: 7200
expire: 2419200
minimum-ttl: 86400